Questions and answers by page

00100-0-A-BL-EN-Facts about the Sun

  1. What is the name of the star at the centre of our solar system?
  2. How does the sun produce energy?
  3. What kind of energy does the sun emit?
  4. What are other names for solar radiation?
  5. What kind of solar radiation can we see?

00200-0-A-BL-EN-Facts about Sunlight

  1. Why is sunshine important to human beings?
  2. What are other names for sunlight?
  3. Is sunlight made of waves or particles?
  4. How fast does sunlight travel through deep space?
  5. Why is too much ultra-violet radiation dangerous?

00300-0-A-BL-EN-Facts about White Light

  1. Does the sun emit electromagnetic radiation?
  2. Does the visible spectrum contain all the wavelengths of the electromagnetic spectrum?
  3. Is light visible as it travels through deep space?
  4. Why do objects appear to be different colours to an observer?
  5. What is the range of wavelengths that makes up the visible spectrum measured in nanometres?

00400-0-A-BL-EN-The Visible Spectrum

  1. Is visible light a form of electromagnetic radiation?
  2. Name six bands of colour in the visible spectrum starting with red?
  3. What is the band of colour with the longest range of wavelengths?
  4. What is the band of colour with the shortest range of wavelengths?
  5. What is nm the shorthand for? ?

00500-0-A-BL-EN-Wavelengths from Red to Violet

  1. Is visible light a form of electromagnetic radiation?
  2. Do different wavelengths of light correspond with different colours?
  3. How many different colours can the human eye see in ideal conditions?
  4. Name two colours with the longest wavelengths?
  5. Name two colours with the shortest wavelengths?

00600-0-A-BL-EN-Bands of Colour from Red to Violet

  1. Is visible light a form of electromagnetic radiation?
  2. Name six bands of colour in the visible spectrum starting with red?
  3. What is the band of colour with the shortest range of wavelengths?
  4. Where are you most likely to see spectral colours on a rainy day?
  5. What is the name of the invisible band of wavelengths next to red?

00700-0-A-BL-EN-Wavelengths between Red to Violet

  1. Is visible light a form of electromagnetic radiation?
  2. Do different wavelengths of light correspond with different colours seen by an observer?
  3. What is the unit of measurement for wavelengths of visible light?
  4. What is the name of the invisible band of wavelengths next to red?
  5. Name two colours with the long wavelengths?

00800-0-A-BL-EN-Continuous Colour from Red to Violet

  1. Is visible light a form of electromagnetic radiation?
  2. Do different wavelengths of light correspond with different colours seen by an observer?
  3. How many different colours can the human eye see in ideal conditions?
  4. Name two colours with the longest wavelengths?
  5. Name two colours with the shortest wavelengths?

00900-0-A-BL-EN-Long Waves to Short Waves

  1. Is an electromagnetic wave the same as a light wave?
  2. Is there a relationship between wavelength and colour?
  3. Can the wavelength of a wave be measured?
  4. Which has the longest wavelength, a red or a violet light wave?
  5. What is the range of wavelengths that correspond with what an observer might describe as green?

00950-0-A-BL-EN-Wavelength and the Electromagnetic Spectrum

  1. What units are used to measure the wavelength of electromagnetic radiation?
  2. Which type of electromagnetic radiation has the shortest wavelengths?
  3. Do radio waves or gamma rays transport more energy?
  4. Do shorter waves have a higher frequency?
  5. Do waves with lower frequency have a longer wavelength?

01000-0-A-BL-EN-Features of Electromagnetic Waves

  1. Is the wave shown in the diagram travelling from left to right?
  2. What is the term for the lowest point in the oscillation of a wave?
  3. Is wavelength measured between the crests of successive waves?
  4. What is the frequency of a wave?
  5. What speed does a light wave travel at in a vacuum?

01100-0-A-BL-EN-Electric and Magnetic Properties of Light

  1. What does propagate mean?
  2. Are electromagnetic waves the same as light waves?
  3. What are the two fields that form an electromagnetic wave?
  4. What is the angle between the electric and magnetic fields of an electromagnetic wave?
  5. What speed does a light wave travel at in a vacuum?

01200-0-A-BL-EN-Comparing Wavelengths-Radio to Gamma

  1. Name two units used to measure the wavelength of electromagnetic waves?
  2. What unit is used to measure wavelength within the visible spectrum?
  3. Which has the longest wavelength, red or violet light waves?
  4. Which has the shortest wavelength, a radio wave or a gamma ray?
  5. Name the two forms of electromagnetic radiation just outside the visible spectrum?

01300-0-A-BL-EN-Comparing Wavelengths of Red and Violet

  1. Name two units used to measure the wavelength of electromagnetic waves?
  2. What is the largest unit used to measure wavelength?
  3. What unit is used to measure wavelength within the visible spectrum?
  4. Do gamma rays have a shorter wavelength than visible light?
  5. How many picometres in a metre?

01400-0-A-BL-EN-Frequency of Electromagnetic Waves

  1. Can you name four units of measurement for frequency?
  2. What is the smallest unit used to measure frequency?
  3. Which colour of visible light has a higher frequency, red or violet?
  4. Does energy increase with frequency?
  5. As frequency increases does wavelength decrease in length?

01500-0-A-BL-EN-Comparing Frequencies of Red and Violet

  1. Name four units of measurement for frequency?
  2. What is the smallest unit used to measure frequency?
  3. Which wave of visible light has a higher frequency, red or violet?
  4. Does energy increase with frequency?
  5. As frequency increases does wavelength decrease in length?

01600-0-A-BL-EN-Electromagnetic spectrum

  1. What unit is used to measure the frequency of visible light?
  2. Which type of electromagnetic radiation has the highest frequency?
  3. Do radio waves or gamma rays transport more energy?
  4. Shorter wavelength = higher frequency or lower frequency ?
  5. Lower frequency = longer wavelengths or shorter wavelengths?

01630-0-A-BL-EN-Wavelength Frequency and Energy Compared

  1. What units are used to measure the wavelength of radio waves?
  2. Which type of electromagnetic radiation has the highest frequency?
  3. Do radio waves or gamma rays transport more energy?
  4. Shorter wavelength = higher frequency or lower frequency ?
  5. Lower frequency = longer wavelengths or shorter wavelengths?

01660-0-A-BL-EN-Wavelength and speed of Light in Different

  1. Does the speed at which light travels change as it propagates through different transparent media?
  2. Give an example of a medium through which light travels more quickly?
  3. Are crown glass and diamonds fast media?
  4. Does the colour of light change as it travels through different media?
  5. Does thewavelength of light change as it travels through different media?

01700-0-A-BL-EN-Why an Object Appears White in Sunlight

  1. What natural source radiates light at all wavelengths of the electromagnetic spectrum?
  2. Does the sun produce light containing all wavelengths of the visible spectrum?
  3. What is the name for light containing all the wavelengths of the visible spectrum at equal intensity?
  4. Name the three RGB primary colours that can together produce white light?
  5. When white light strikes an object, what determines the colour an observer sees?

01800-0-A-BL-EN-Why an Object Appears Red in Sunlight

2400

  1. What colour is the ball painted in this diagram?

3000

  1. What does RBG stand for?
  2. What does ROYGBV stand for?
  3. What is the visible spectrum?
  4. What is white light?
  5. What is a continuous spectrum?

3100

  1. What are additive primary colours?
  2. Name three addivite primary colours!
  3. Does each wavelength of visible light correspond with a unique spectral colour?
  4. What are non-spectral colours?
  5. What is the visible spectrum?

3200

  1. What are spectral colours?
  2. What wavelengths correspond with the extreme limits of the visible spectrum?
  3. Does each wavelength of visible light correspond with a unique spectral colour?
  4. Are rainbow colours spectral colours?
  5. Are colours produced by combining RGB primary colours spectral colours?

3300

  1. What are spectral colours?
  2. What are RGB colours?
  3. What are secondary colours?
  4. Can ROYGBV all be produced by a single wavelength of light?
  5. Can RGB be produced by combining other wavelengths of light?
  6. Can the spectral colours orange, yellow and violet be produced by combining primary colours?

3400

  1. What are spectral colours?
  2. What are RGB colours?
  3. What is a cone cell?
  4. Does the peak response of cone cells in the human eye correspond directly with RGB?
  5. Why do objects appear to be different colours to an observer?

3500 – 3700

  1. What are the three wavelengths of light that when mixed together in equal proportions make white?
  2. What are RGB primary colours?
  3. What are additive primary colours?
  4. What are secondary colours?
  5. What are the thee CMY primary colours?

3800

  1. Name three colours of light that together make white?
  2. What are the three primary colours in the RGB colour model?
  3. How many tertiary colours are there in the RGB colour model?
  4. What is a RGB colourwheel?
  5. What is the difference between spectral colour and RGB colour?

3900

  1. What are the two primary colours of light that together make yellow?
  2. What are secondary colours?
  3. Does a computer screen use the RGB or the CMYK colour model?
  4. Why are spectral colours usually arrange in a band with red at one end and violet at the other?
  5. Why are RGB colours usually arrange as a colourwheel?

4000

  1. In which colour model is cyan a secondary colour?
  2. What are the two primary colours of light that together make cyan?
  3. Is cyan a spectral colour?
  4. In which colour model is cyan a primary colour?
  5. What is the difference between the CMY colour model and printers that use CMYK?

4100

  1. In which colour model is magenta a secondary colour?
  2. What are the two primary colours of light that together make magenta?
  3. Is magenta a spectral colour?
  4. In which colour model is magenta a primary colour?
  5. What is the difference between the CMY colour model and printers that use CMYK?

4150

  1. Name three primary colours of light that together make white?
  2. Why do inks and pigments corresponding with the three CMY primary colours produce a dark brown or black?
  3. Why do overlapping wavelengths of light corresponding with cyan, magenta and yellow make black?
  4. What is a RGB colourwheel?
  5. What is the difference between spectral colour and RGB colour?

4160

  1. What is a RGB colourwheel?
  2. How many primary colours in an RGB colourwheel?
  3. How many secondary colours in an RGB colourwheel with six colours?
  4. How many tertiary colours in an RGB colourwheel with eighteen colours?
  5. What is the difference between spectral colour and RGB colour?

4170

  1. Do all RGB colour wheels start with primary colours?
  2. Do all RGB colour wheels include secondary colours?
  3. Do all RGB colour wheels include tertiary colours?
  4. Is every colour on a colour wheel produced by mixing equal proportions of the colours on either side?
  5. What is the difference between spectral colour and RGB colour?

4180 Needs splitting up into three diagrams

  1. What is the difference between spectral colour and RGB colour?
  2. What are the six primary and secondary colours in the RGB colour model?
  3. Why are spectral colours usually arrange in a band with red at one end and violet at the other?
  4. Why are RGB colours often arranged in the form of a colourwheel?
  5. What is the RGB colour model?

4200-0 to 4200-6

  1. What is a RGB colour wheel?
  2. What are the three primary colours when starting an RGB colourwheel?
  3. What are the three secondary colours when building an RGB colourwheel?
  4. Are equal proportions of primary colours used to produce secondary colours?
  5. Can all the colours in a colourwheel be produced by mixing pairs of primary colours in different proportions?

4300
4500
4900
5100
5300
5350
5360
5400

  1. What is meant by the wavelength of a wave?
  2. What is meant by the frequency of a wave?
  3. How is frequency calculated?
  4. Does the speed of light alter as it travels through different transparent media?
  5. What is the speed of light in a vaccuum rounded up to the next thousand?

5500

  1. What does a (ray of light) represent in a diagram?
  2. What is incident light?
  3. What is reflection?
  4. What is refraction?
  5. What is a medium?

5600

  1. What is a medium?
  2. What is meant by the normal?
  3. What happens when light undergoes refraction?
  4. What does Snells’ law deal with?
  5. What is refraction?

5700

  1. What is refraction?
  2. How does the refractive index of a medium relate to the speed of light?
  3. How is the refractive index of a medium calculated?
  4. Why does the refractive index of a vaccuum = 1?
  5. How do the refractive indices of different media affect the direction in which light travels?

5750

  1. What is refraction?
  2. How does the refractive index of a medium relate to the speed of light?
  3. How is the refractive index of a medium calculated?
  4. Why does the refractive index of a vaccuum = 1?
  5. How do the refractive indices of different media affect the direction in which light travels?

5800

  1. What is the other term used for refractive index?
  2. What is the other term used for the law of refraction?
  3. What is the sine of an angle?
  4. What can be calculated if we know the refractive index of two adjacent media?
  5. How do the refractive indices of different media affect the direction in which light travels?

5900

  1. What is meant by chromatic dispersion?
  2. What is refraction?
  3. What is meant by the normal?
  4. How is chromatic dispersion related to refraction?
  5. Will light bend towards the normal as it crosses the boundary between air and glass?

6000

  1. What is meant by chromatic dispersion?
  2. What is refraction?
  3. What is meant by the normal?
  4. How is chromatic dispersion related to refraction?
  5. Will light bend towards the normal as it crosses the boundary between air and glass?

6100

  1. What is incident light?
  2. What is reflection?
  3. What is meant by the normal?
  4. When light stikes a surface is the angle of incidence always the same as the angle of reflection?
  5. Where are the angles of incidence and reflection drawn on a ray diagram?

6200

  1. What is refraction?
  2. What is reflection?
  3. What is meant by the normal?
  4. When light stikes a surface is the angle of incidence always the same as the angle of reflection?
  5. Will light bend towards the normal as it crosses the boundary between air and glass?

6300

  1. What is refraction?
  2. What is reflection?
  3. What is meant by the normal?
  4. When light stikes a surface is the angle of incidence always the same as the angle of reflection?
  5. Will light bend towards the normal as it crosses the boundary between air and glass?

6400

  1. What is refraction?
  2. What is reflection?
  3. What is meant by the normal?
  4. When light stikes a surface is the angle of incidence always the same as the angle of reflection?
  5. Will light bend towards the normal as it crosses the boundary between air and glass?

6600

  1. What is refraction?
  2. What is meant by the normal?
  3. Will light bend towards the normal as it crosses the boundary between air and glass?
  4. Does light travel faster in air than in glass?
  5. Does chromatic dispersion take place as white light travels from air into glass?

6650

  1. What is refraction?
  2. What is meant by the normal?
  3. Will light bend away the normal as it crosses the boundary between glass and air?
  4. Does light travel faster in air than in glass?
  5. Does chromatic dispersion take place as white light travels from air into glass?

6660

  1. What is meant by chromatic dispersion?
  2. What is refraction?
  3. What is meant by the normal?
  4. How is chromatic dispersion related to refraction?
  5. Will light bend towards the normal as it crosses the boundary between air and glass?

6670

  1. What is refraction?
  2. What is meant by the normal?
  3. Will light bend towards the normal as it crosses the boundary between air and glass?
  4. Does light travel faster in air than in glass?
  5. Does chromatic dispersion take place as white light travels from air into glass?

6680

  1. What is refraction?
  2. What is meant by the normal?
  3. Will light bend towards the normal as it crosses the boundary between air and glass?
  4. How is wavelength affacted as light travel from air into glass?
  5. How is frequency affacted as light travel from air into glass?

08000-0-A-BL-EN-How to See a Rainbow

08010-0-A-BL-EN-Take a Photo of a Rainbow

08020-0-A-BL-EN-Rainbow Anatomy

08030-0-A-BL-EN-Rainbows Seen From the Air

08040-0-A-BL-EN-Rainbows Seen From the Ground

08050-0-A-BL-EN-A Rainbow is an Optical Phenomenon

08060-0-A-BL-EN-Sun, Observer and Rainbow Share a Common Axis

08070-0-A-BL-EN-Lower the Sun, Higher the Rainbow

08080-0-A-BL-EN-Higher the Sun, the Lower the Rainbow

08090-0-A-BL-EN-Rainbows Appear as Arcs of Spectral Colour

08100-0-A-BL-EN-Apparent Position of a Rainbow

08110-0-A-BL-EN-Deflection and Dispersion in Raindrops

08120-0-A-BL-EN-Reflection and Refraction in a Raindrop

08130-0-A-BL-EN-Dispersion of White Light in a Raindrop

08140-0-A-BL-EN-Refraction and Dispersion in a Raindrop

08150-0-A-BL-EN-Path of Red Ray Through a Raindrop

08160-0-A-BL-EN-Angle of Deviation in a Raindrop

08170-0-A-BL-EN-Angular Distance& Raindrop Colour

08180-0-A-BL-EN-Observed Colour of Raindrops

08190-0-A-BL-EN-Primary and Secondary Rainbows

08200-0-A-BL-EN-Raindrop Elevation and Colour

08210-0-A-BL-EN-Alexander’s Band

08220-0-A-BL-EN-Colour Brightness and Angular Distance

08230-0-A-BL-EN-Rainbows as Superimposed Discs of Colour

08240-0-A-BL-EN-Rainbows as Cones of Colour

08250-0-A-BL-EN-Rainbows and the Polarization of Light

08270-0-A-BL-EN-Polarization of Light in a Raindrop

08280-0-A-BL-EN-Path of Parallel Rays Through a Raindrop

08290-0-A-BL-EN-Path of Rays Through a Raindrop

08300-0-A-BL-EN-Raindrop Anatomy

08310-0-A-BL-EN-Raindrop Geometry

08320-0-A-BL-EN-Angles of Deflection & Deviation

08355-0-A-BL-EN-Minimum Angle of Deviation

08360-0-A-BL-EN-Rainbow Rays

08370-0-A-BL-EN-Angles of Deviation

08380-0-A-BL-EN-Wavelength Refractive Index & Colour